2 Copyright (C) 2012-2021 Carl Hetherington <cth@carlh.net>
4 This file is part of libdcp.
6 libdcp is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 libdcp is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with libdcp. If not, see <http://www.gnu.org/licenses/>.
19 In addition, as a special exception, the copyright holders give
20 permission to link the code of portions of this program with the
21 OpenSSL library under certain conditions as described in each
22 individual source file, and distribute linked combinations
25 You must obey the GNU General Public License in all respects
26 for all of the code used other than OpenSSL. If you modify
27 file(s) with this exception, you may extend this exception to your
28 version of the file(s), but you are not obligated to do so. If you
29 do not wish to do so, delete this exception statement from your
30 version. If you delete this exception statement from all source
31 files in the program, then also delete it here.
35 /** @file src/picture_asset.cc
36 * @brief PictureAsset class
40 #include "picture_asset.h"
42 #include "exceptions.h"
43 #include "openjpeg_image.h"
44 #include "picture_asset_writer.h"
45 #include "dcp_assert.h"
46 #include "compose.hpp"
47 #include "j2k_transcode.h"
48 #include <asdcp/AS_DCP.h>
49 #include <asdcp/KM_fileio.h>
50 #include <libxml++/nodes/element.h>
51 #include <boost/filesystem.hpp>
62 using std::shared_ptr;
66 PictureAsset::PictureAsset (boost::filesystem::path file)
68 , _intrinsic_duration (0)
74 PictureAsset::PictureAsset (Fraction edit_rate, Standard standard)
76 , _edit_rate (edit_rate)
77 , _intrinsic_duration (0)
84 PictureAsset::read_picture_descriptor (ASDCP::JP2K::PictureDescriptor const & desc)
86 _size.width = desc.StoredWidth;
87 _size.height = desc.StoredHeight;
88 _edit_rate = Fraction (desc.EditRate.Numerator, desc.EditRate.Denominator);
89 _intrinsic_duration = desc.ContainerDuration;
90 _frame_rate = Fraction (desc.SampleRate.Numerator, desc.SampleRate.Denominator);
91 _screen_aspect_ratio = Fraction (desc.AspectRatio.Numerator, desc.AspectRatio.Denominator);
96 PictureAsset::descriptor_equals (
97 ASDCP::JP2K::PictureDescriptor const & a, ASDCP::JP2K::PictureDescriptor const & b, NoteHandler note
101 a.EditRate != b.EditRate ||
102 a.SampleRate != b.SampleRate ||
103 a.StoredWidth != b.StoredWidth ||
104 a.StoredHeight != b.StoredHeight ||
105 a.AspectRatio != b.AspectRatio ||
106 a.Rsize != b.Rsize ||
107 a.Xsize != b.Xsize ||
108 a.Ysize != b.Ysize ||
109 a.XOsize != b.XOsize ||
110 a.YOsize != b.YOsize ||
111 a.XTsize != b.XTsize ||
112 a.YTsize != b.YTsize ||
113 a.XTOsize != b.XTOsize ||
114 a.YTOsize != b.YTOsize ||
116 // a.CodingStyleDefault != b.CodingStyleDefault ||
117 // a.QuantizationDefault != b.QuantizationDefault
120 note (NoteType::ERROR, "video MXF picture descriptors differ");
124 if (a.ContainerDuration != b.ContainerDuration) {
125 note (NoteType::ERROR, "video container durations differ");
128 // for (unsigned int j = 0; j < ASDCP::JP2K::MaxComponents; ++j) {
129 // if (a.ImageComponents[j] != b.ImageComponents[j]) {
130 // notes.pack_start ("video MXF picture descriptors differ");
139 PictureAsset::frame_buffer_equals (
140 int frame, EqualityOptions opt, NoteHandler note,
141 uint8_t const * data_A, unsigned int size_A, uint8_t const * data_B, unsigned int size_B
144 if (size_A == size_B && memcmp (data_A, data_B, size_A) == 0) {
145 note (NoteType::NOTE, "J2K identical");
146 /* Easy result; the J2K data is identical */
150 /* Decompress the images to bitmaps */
151 auto image_A = decompress_j2k (const_cast<uint8_t*>(data_A), size_A, 0);
152 auto image_B = decompress_j2k (const_cast<uint8_t*>(data_B), size_B, 0);
156 vector<int> abs_diffs (image_A->size().width * image_A->size().height * 3);
160 for (int c = 0; c < 3; ++c) {
162 if (image_A->size() != image_B->size()) {
163 note (NoteType::ERROR, String::compose ("image sizes for frame %1 differ", frame));
167 int const pixels = image_A->size().width * image_A->size().height;
168 for (int j = 0; j < pixels; ++j) {
169 int const t = abs (image_A->data(c)[j] - image_B->data(c)[j]);
171 max_diff = max (max_diff, t);
176 for (vector<int>::iterator j = abs_diffs.begin(); j != abs_diffs.end(); ++j) {
180 double const mean = double (total) / abs_diffs.size ();
182 uint64_t total_squared_deviation = 0;
183 for (auto j: abs_diffs) {
184 total_squared_deviation += pow (j - mean, 2);
187 auto const std_dev = sqrt (double (total_squared_deviation) / abs_diffs.size());
189 note (NoteType::NOTE, String::compose("mean difference %1 deviation %2", mean, std_dev));
191 if (mean > opt.max_mean_pixel_error) {
194 String::compose ("mean %1 out of range %2 in frame %3", mean, opt.max_mean_pixel_error, frame)
200 if (std_dev > opt.max_std_dev_pixel_error) {
203 String::compose ("standard deviation %1 out of range %2 in frame %3", std_dev, opt.max_std_dev_pixel_error, frame)
214 PictureAsset::static_pkl_type (Standard standard)
217 case Standard::INTEROP:
218 return "application/x-smpte-mxf;asdcpKind=Picture";
219 case Standard::SMPTE:
220 return "application/mxf";
228 PictureAsset::pkl_type (Standard standard) const
230 return static_pkl_type (standard);